CVE-2025-32029
ts-asn1-der has Incorrect DER Encoding of Numbers Leading to Denial of Service and Incorrect Value Representation
Impact
### Impact Incorrect `number` DER encoding can lead to denial on service for absolute values in the range `2**31` -- `2**32 - 1`. The arithmetic in the `numBitLen` didn't take into account that values in this range could result in a negative result upon applying the `>>` operator, leading to an infinite loop. In addition, `number` encoding had a few other issues that resulted it in it not encoding values correctly. ### Patches The issue is patched in version `1.0.4`. Users are recommended to upgrade as soon as possible. ### Workarounds If upgrading is not an option, the issue can be mitigated by validating inputs to `Asn1Integer` to ensure that they are not smaller than `-2**31 + 1` and no larger than `2**31 - 1`. Although `Asn1Integer` supports `bigint` inputs, some additional implementation issues make using `bigint` as a mitigation inviable, as it will result in incorrect values. If upgrading is not an option and range checks are impractical or undesirable, input to `Asn1Integer` can be provided as a buffer to be used directly. Note that this requires computing the correct DER encoding externally. ### References N/A
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @apeleghq/asn1-der | < 1.0.4 | 1.0.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/ApelegHQ/ts-asn1-der/commit/b2bc9032cbe19755d234a27d79e47a7e52993af8
- https://github.com/ApelegHQ/ts-asn1-der/security/advisories/GHSA-p4qw-7j9g-5h53
- https://github.com/advisories/GHSA-p4qw-7j9g-5h53
- https://nvd.nist.gov/vuln/detail/CVE-2025-32029